Search 1,000 of PHOTOSKatherine Evelyn Anita "Katie" Cassidy (born November 25, 1986) is an American actress who has performed in The CW TV series Melrose Place, Supernatural, Harper's Island, and Gossip Girl, and on the films When a Stranger Calls, Black Christmas, A Nightmare on Elm Street, Taken, Fencewalker and Monte Carlo. Cassidy was born in Los Angeles, California, the daughter of actor David Cassidy and model Sherry Williams.